edu.ucla.sspace.hal

Class GeometricWeighting

java.lang.Object

edu.ucla.sspace.hal.GeometricWeighting

All Implemented Interfaces:

WeightingFunction

public class GeometricWeighting
extends Object
implements WeightingFunction

A geometically-decreasing weighting scheme for specifying how a HyperspaceAnalogueToLanguage instance should weigh co-occurrences based on the word distance.

Constructor Summary

Constructors

Constructor and Description
GeometricWeighting()

Method Summary

Methods

Modifier and Type	Method and Description
double	weight(int positionOffset, int windowSize) Returns the weighed value where the closest words receive a weight equal to the window size and the most distance words receive a weight of 1, using a geometric (1 / 2n) decrease for in-between values.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GeometricWeighting

public GeometricWeighting()

Method Detail

weight

public double weight(int positionOffset,
            int windowSize)

Returns the weighed value where the closest words receive a weight equal to the window size and the most distance words receive a weight of 1, using a geometric (1 / 2ⁿ) decrease for in-between values.

Specified by:

weight in interface WeightingFunction

Parameters:

positionOffset - the location of the word relative to the current position

windowSize - the maximum nubmer of words on one side that will be considered for weighting

Returns:

the weight to apply